民用航空发动机短舱雷电防护设计及验证

为了有效降低短舱雷电防护设计和验证的难度,针对短舱的雷电防护设计和验证,提出一种导电路径仿真与关键连接结构仿真、试验迭代的研究方法。对整个短舱进行雷电流传导路径设计及简化建模,分别讨论不同传导路径方案对雷电直接效应和间接效应的影响。结果表明:优化的多路径传导可有效减小传导结构的雷电流分量和短舱内的脉冲电磁场;依据整体短舱电流分布仿真结果,可导出具体连接结构的电流分量作为其设计和验证的依据。所提出的方法可作为短舱雷电防护设计和验证的理论依据。

Design and Verification of Lightning Protection in Civil Aeroengine Nacelle System

In order to effectively reduce the difficulty of design and verification of lightning protection,a research method of electrical path simulation,key connection structure simulation and test iteration was proposed for the design and verification of nacelle system lightning protection.The lightning current conduction path design and simplified modeling of the whole nacelle system were carried out,and the effects of different conduction path schemes on the direct and indirect effects of lightning were discussed respectively.The results show that the optimized multi-path conduction can effectively reduce the lightning current component of the conduction structure and the pulse electromagnetic field in the nacelle system.According to the simulation results of the whole nacelle system current distribution,the current component of the specific connection structure can be derived as the basis for its design and verification.The proposed method can be used as the theoretical basis for the design and verification of nacelle system lightning protection.